Molding compounds with reduced adhesiveness use in the automobile industry

ABSTRACT

The invention relates to a molding composition comprising, based on the total of components A to G, which is 100% by weight, 
     a) as component A of the molding composition, from 1 to 99,59% by weight of at least one polycondensate, 
     b) as component B, from 0.1 to 20% by weight of at least one particulate graft copolymer with a glass transition temperature of the soft phase below 0° C. and with a median particle size of from 50 to 1000 nm, 
     c) as component C, from 0.1 to 20% by weight of at least one copolymer made from the following monomers 
     c1) as component C1, from 50 to 90% by weight of at least one vinylaromatic monomer, and 
     c2) as component C2, from 10 to 50% by weight of acrylonitrile and/or methacrylonitrile, in each case based on component C, 
     d) as component D, from 0 to 20% by weight of a copolymer similar to component C, where the content in % by weight of acrylonitrile and/or methacrylonitrile in component C differs from that in component D, 
     e) as component E, from 0.1 to 20% by weight of a polyester other than component A, 
     f) as component F, from 0.01 to 10% by weight of at least one nucleating agent and of at least one transesterification stabilizer, where the ratio by weight of nucleating agent to transesterification stabilizer is from 1:100 to 100:1, and 
     g) as component G, from 0.1 to 10% by weight of customary additives, such as carbon black, UV stabilizers, oxidation retarders, lubricants and mold-release agents, and to moldings, products, recycled materials and laminates produced from the same, and to the use of these.

The invention relates to molding compositions, moldings, products,recycled materials, and also laminates, and to the use of these.

Moldings made from polymeric materials and used in particular in theinterior of motor vehicles have to meet high requirements, especially inrelation to their mechanical properties, their surface properties, theiraging performance, and also their emission performance or odorperformance. Various polymeric materials have been used hitherto forproducing moldings for automotive construction and automotive interiorapplications.

One material used is ABS. This material has poor UV resistance, poorheat-aging resistance and poor heat resistance (Vicat B softening point<110° C.).

Another material used is ABS/PC (a polymer blend made fromacrylonitrile/butadiene/styrene copolymer and polycarbonate). However,this material has inadequate UV resistance, poor heat-aging performance(toughness and elongation at break after heat-aging), poor environmentalstress cracking resistance, for example with respect to plasticizer,poor flowability, and also in particular poor emission properties andpoor odor performance. For the purposes of the present invention, odorperformance is the tendency of materials to release volatileconstituents with detectable odor after the material has been stored fora specified time under particular conditions of temperature and ofhumidity.

Another material used is ABS/PA (a polymer blend made from ABS andpolyamide). ABS/PA, too, has poor UV resistance, poor heat resistance(Vicat B softening point <110° C.), poor heat-aging resistance, poordimensional stability due to high moisture absorption, and also poorflowability.

Another material used is PPE/HIPS (a polymer blend made frompolyphenylene oxide and impact-modified polystyrene). Disadvantages ofthis material are poor flowability, poor UV resistance, foam adhesionand heat-aging resistance, and also its poor odor performance.

Use is also made of PET/PC (a polymer blend made from polyethyleneterephthalate and polycarbonate). Disadvantages of this material arepoor environmental stress cracking resistance, for example with respectto plasticizers, and also its poor flowability.

Another material used is PBT/PC, which has poor flowability andenvironmental stress cracking resistance.

Most of the abovementioned materials have poor heat resistance,expressed in terms of a low Vicat B softening point (Vicat B <130° C.),and also poor heat-aging resistance. However, good heat resistance andheat-aging resistance are essential in the materials used, since theinterior of a motor vehicle can be subject to considerable heating, inparticular when exposed to insolation.

The materials currently available also have shortcomings for externalapplications. For example, blends made from PPE and PA have poordimensional stability due to moisture absorption, and poorprocessibility.

It has been possible to remove the abovementioned disadvantages usingpolymeric materials based on PBT/ASA/PSAN (polymer blends made frompolybutylene terephthalate, acrylonitrile/styrene/acrylate copolymer andpolystyrene/acrylonitrile copolymer). A general disclosure of materialsof this type is made in DE-A 39 11 828. The examples relate to moldingcompositions with high acrylonitrile content in the PSAN copolymers.However, moldings made from these molding compositions, like themajority of the abovementioned materials, have poor emission performanceand odor performance.

In addition, when processed by injection molding these polymericmaterials have disadvantages. Freshly produced injection moldings haverelatively high adhesion to the mold walls, for example due toincomplete crystallization. This relatively high adhesion makes itnecessary to provide the surfaces of the injection molds withappropriate adhesion-reducing agents, in order to avoid unnecessaryprolongation of the cycle times for the individual injection-moldingprocedures as a result of the tendency of the molding composition toadhere. Another way of keeping the cycle time very low is to admixadhesion-reducing agents with the molding composition itself. However,the use of adhesion-reducing agents either in the injection mold, orelse in the molding composition itself, mostly causes undesirabledeposits on the surface of the injection mold, and these have, forexample, an adverse effect on the surface of the molding. The cycle timeis defined as the period from injection of the melt of the moldingcomposition to demolding of the injection molding. The cycle time has adirect effect on the number of units produced on each injection moldingplant, and therefore on the cost of the injection molding. It is, ofcourse, possible to reduce the tendency of the molding composition toadhere by cooling the injection molds. However, this is firstly attendedby high technical costs and secondly means that cooling has to berepeated for each cycle, and over a large number of cycles the attendanttemperature variations bring about relatively rapid materials fatigue inthe injection mold, which then has to be replaced more frequently.

It is an object of the present invention to provide molding compositionssuitable for producing moldings Which are used in the interior of motorvehicles and for exterior body parts and have an advantageous propertyprofile with respect to their mechanical, optical and surfaceproperties, and also in particular have good heat resistance andheat-aging resistance and good emission performance and/or odorperformance. The molding compositions should also have very low density.The low density is particularly advantageous with regard to fuel savingin motor vehicles. The moldings should also be easy to recycle. Afurther object is to reduce the adhesion of the molding compositions ininjection molding and to avoid any impairment of the other properties asa result of this reduction. A further object is that there should bevery little need to cool the surface of the injection mold in order toremove the molding from the mold. A further object is that the amount ofadhesion-reducing agent used on the surface of the injection mold and,respectively, in the molding composition should be kept very low,especially so that no deposits of this adhesion-reducing agent developon the surface of the injection mold.

We have found that this object is achieved by a molding compositioncomprising, based on the total of components A to G, which is 100% byweight,

a) as component A of the molding composition, from 1 to 99.59% by weightof at least one polycondensate,

b) as component B, from 0.1 to 20% by weight of at least one particulategraft copolymer with a glass transition temperature of the soft phasebelow 0° C. and with a median particle size of from 50 to 1000 nm,

c) as component C, from 0.1 to 20% by weight of at least one copolymer.made from the following monomers

c1) as component C1, from 50 to 90% by weight of at least onevinylaromatic monomer, and

c2) as component C2, from 10 to 50% by weight of acrylonitrile and/ormethacrylonitrile, in each case based on component C,

d) as component D, from 0 to 20% by weight of a copolymer similar tocomponent C, where the content in % by weight of acrylonitrile and/ormethacrylonitrile in component C differs from that in component D,

e) as component E, from 0.1 to 20% by weight of a polyester other thancomponent A,

f) as component F, from 0.01 to 10% by weight of at least one nucleatingagent and of at least one transesterification stabilizer, where theratio by weight of nucleating agent to transesterification stabilizer isfrom 1:100 to 100:1, preferably from 1:10 to 10:1 and particularlypreferably from 1:3 to 3:1, and

g) as component G, from 0.1 to 10% by weight of customary additives,such as carbon black, UV stabilizers, oxidation retarders, lubricantsand mold-release agents.

Each of the components differs from the others and is described indetail below.

The novel molding composition comprises, as complementary constituentcomponent A, up to 99.59% by weight based on the molding composition,preferably from 20 to 75% by weight, particularly preferably from 30 to60% by weight, of a preferably fusible polycondensate, preferably of apolyester and particularly preferably of an aromatic polyester. Thepolycondensates present in the novel molding compositions are known perse. It is preferable for the polycondensates to have a viscosity number(VN) of from 40 to 170, preferably from 80 to 140 and particularlypreferably from 100 to 135.

The polyester may preferably be prepared by reacting terephthalic acid,its esters or other ester-forming derivatives, with 1,4-butanediol,1,3-propanediol or, respectively, 1,2-ethanediol, in a manner known perse.

Up to 20 mol % of the terephthalic acid may be replaced by otherdicarboxylic acids. Those which may be mentioned, merely as examples,are naphthalene-dicarboxylic acids, isophthalic acid, adipic acid,azelaic acid, sebacic acid, dodecanedioic acid andcyclohexanedicarboxylic acids, mixtures of these carboxylic acids, andester-forming derivatives of the same.

Up to 20 mol % of the dihydroxy compounds 1,4-butanediol,1,3-propanediol or, respectively, 1,2-ethanediol may also be replaced byother dihydroxy compounds, e.g. 1,6-hexanediol, 1,4-hexanediol,1,4-cyclohexanediol, 1,4-di(hydroxymethyl)cyclohexane, bisphenol A,neopentyl glycol, mixtures of these diols, or also ester-formingderivatives of the same.

Other preferred aromatic polyesters are polytrimethylene terephthalate(PTT) and in particular polybutylene terephthalate (PBT), whoseformation involves exclusively terephihalic acid and the appropriatediols 1,2-ethanediol, 1,3-propariediol and 1,4-butanediol. Some or allof the aromatic polyesters may be used in the form of recycled polyestermaterials, such as PET regrind from bottle material or from wastes frombottle production.

In a particularly preferred embodiment, component A is composed of

a1) from 50 to 100% by weight, preferably from 80 to 100% by weight,particularly preferably from 90 to 100% by weight, of polybutyleneterephthalate and of

a2) from 0 to 50% by weight, preferably from 0 to 20%, particularlypreferably from 0 to 10% by weight, of another polycondensate.

In a further embodiment of the invention, the molding composition doesnot comprise any PET. Preferred molding compositions are moreover thosein which component A is free from PET.

The novel molding composition comprises, as component B, from 1 to 20%by weight, preferably from 2 to 8% by weight, particularly preferablyfrom 2.5 to 7% by weight, in particular from 3 to 6% by weight, of atleast one particulate graft copolymer with a glass transitiontemperature of the soft phase below 0° C. and with a median particlesize of from 50 to 1000 nm.

Component B is preferably a graft copolymer made from

b1) from 50 to 90% by weight of a particulate graft base B1 with a glasstransition temperature below 0° C., and

b2) from 10 to 50% by weight of a graft B2 made from the followingmonomers

b21) as component B21, from 50 to 90% by weight of a vinylaromaticmonomer, and

b22) as component B22, from 10 to 50% by weight of acrylonitrile and/ormethacrylonitrile.

The particulate graft base B1 may be composed of from 70 to 100% byweight of a C₁-C₁₀ conjugated diene; preferably of a C₁-C₁₀-alkylacrylate, and from 0 to 30% by weight of a bifunctional monomer havingtwo non-conjugated olefinic double bonds. Graft bases of this type areused, for example, as component B in ABS polymers or MBS polymers.

In a preferred embodiment of the invention, the graft base B1 iscomposed of the following monomers:

b11) as component B11, from 75 to 99.9% by weight of a C₁-C₁₀-alkylacrylate,

b12) as component B12, from 0.1 to 10% by weight of at least onepolyfunctional monomer having at least two non-conjugated olefinicdouble bonds, and

b13) as component B13, from 0 to 24.9% by weight of one or more othercopolymerizable monomers.

The graft base B1 is an elastomer whose glass transition temperature ispreferably below −20° C., particularly preferably below −30° C.

The main monomers B11 used to prepare the elastomer are acrylates havingfrom 1 to 10 carbon atoms, in particular from 4 to 8 carbon atoms, inthe alcohol component. Particularly preferred monomers B11 are isobutylacrylate and n-butyl acrylate, and also 2-ethylhexyl acrylate,particularly preferably butyl acrylate.

Besides the acrylates, the crosslinking monomer B12 used is from 0.1 to10% by weight, preferably from 0.1 to 5% by weight, particularlypreferably from 1 to 4% by weight, of a polyfunctional monomer having atleast two non-conjugated olefinic double bonds. Examples of these aredivinylbenzene, diallyl fumarate, diallyl phthalate, triallyl cyanurate,triallyl isocyanurate, tricyclodecenyl acrylate anddihydrodicyclopentadienyl acrylate, particularly preferably the lattertwo.

Besides the monomers B11 and B12, the structure of the graft base B1 mayalso involve up to 24.9% by weight, preferably up to 20% by weight, ofother copolymerizable monomers, preferably 1,3-butadiene, styrene,α-methylstyrene, acrylonitrile, methacrylonitrile and C₁-C₈-alkylmethacrylates, or mixtures of these monomers. In a particularlypreferred embodiment no 1,3-butadiene is present in the graft base B1,and the graft base B1 is composed in particular exclusively ofcomponents B11 and B12.

Grafted onto the graft base B1 there is a graft B2 made from thefollowing monomers:

b21) as component B21, from 50 to 90% by weight, preferably from 60 to90% by weight, particularly preferably from 65 to 80% by weight, of avinylaromatic monomer, and

b22) from 10 to 50% by weight, preferably from 10 to 40% by weight,particularly preferably from 20 to 35% by weight, of acrylonitrile ormethacrylonitrile or mixtures of these.

Examples of vinylaromatic monomers are unsubstituted styrene andsubstituted styrenes, such as α-methylstyrene, p-chlorostyrene andp-chloro-α-methylstyrene. Preference is given to unsubstituted styreneand α-methylstyrene, particularly preferably unsubstituted styrene.

In one embodiment of the invention the median particle size of componentB is from 50 to 200 nm, preferably from 55 to 150 nm.

In another embodiment of the invention the median particle size ofcomponent B is From 200 to 1000 nm, preferably from 400 to 550 nm.

In a particularly preferred embodiment of the invention component B hasbimodal particle size distribution and is composed of from 10 to 90% byweight, preferably from 30 to 90% by weight, particularly preferablyfrom 50 to 75% by weight, of a small-particle graft copolymer with amedian particle size of from 50 to 200 nm, preferably from 55 to 150 nm,and of from 10 to 90% by weight, preferably from 10 to 70% by weight,particularly preferably from 25 to 50% by weight, of a large-particlegraft copolymer with a median particle size of from 250 to 1000 nm,preferably from about 400 to 550 nm.

The median particle size and particle size distribution given are thesizes determined from the integral mass distribution. The medianparticle sizes according to the invention ate in all cases the ponderalmedian of the particle sizes. The determination of these is based on themethod of W. Scholtan and H. Lange, Kolloid-Z. und Z.-Polymere 250(1972), pages 782-796, using an analytical ultracentrifuge. Theultracentrifuge measurement gives the integral mass distribution ofparticle diameters in a specimen. From this it is possible to deducewhat percentage by weight of the particles has a diameter identical toor smaller than a particular size. The median particle diameter, whichis also termed the d₅₀ of the integral mass distribution, is definedhere as the particle diameter at which 50% by weight of the particleshave a diameter smaller than that corresponding to the d₅₀. Equally, 50%by weight of the particles then have a larger diameter than the d₅₀. Todescribe the breadth of the particle size distribution of the rubberparticles, d₁₀ and d₉₀ values given by the integral mass distributionare utilized alongside the d₅₀ value (median particle diameter). The d₁₀and d₉₀ of the integral mass distribution are defined similarly to thed₅₀, with the difference that they are based on, respectively, 10 and90% by weight of the particles. The quotient

(d ₉₀ −d ₁₀)/d ₅₀ =Q

is a measure of the breadth of the particle size distribution. Emulsionpolymers A which can be used according to the invention as component Apreferably have Q less than 0.5, in particular less than 0.35.

The graft copolymer B generally has one or more stages, i.e. it is apolymer composed of a core and of one or more shells. The polymer iscomposed of a base (graft core) B1 and of, grafted onto this, one, orpreferably more than one, stages B2, known as grafts or graft shells.

By grafting one or more times it is possible to apply one or more graftshells to the rubber particles. Each graft shell may have a differentmakeup. In addition to the grafting monomers, polyfunctionalcrosslinking monomers or monomers containing reactive groups may begrafted on (see, for example, EP-A 0 230 282, DE-A 36 01 419, EP-A 0 269861).

In one embodiment of the invention, crosslinked acrylate polymers with aglass transition temperature below 0° C. serve as graft base B1. Thecrosslinked acrylate polymers should preferably have a glass transitiontemperature below −20° C., in particular below −30° C.

In principle the structure of the graft copolymer may also have two ormore layers, where at least one inner layer should have a glasstransition temperature below 0° C. and the outermost layer should have aglass transition temperature above 23° C.

In a preferred embodiment, the graft B2 is composed of at least onegraft shell. The outermost graft shell of these has a glass transitiontemperature above 30° C. A polymer formed from the monomers of the graftB2 would have a glass transition temperature above 80° C.

Suitable preparation processes for graft copolymers B are emulsion,solution, bulk and suspension polymerization. The graft copolymers B arepreferably prepared by free-radical emulsion polymerization, attemperatures of from 20 to 90° C. using water-soluble and/or oil-solubleinitiators, such as peroxodisulfate or benzoyl peroxide, or with the aidof redox initiators. Redox initiators are also suitable forpolymerization below 20° C.

Suitable emulsion polymerization processes are described in DE-A-28 26925, DE-A 31 49 358 and in DE-C-12 60 135.

The graft shells are preferably built up in the emulsion polymerizationprocess as described in DE-A-32 27 555, 31 49 357, 31 49 358 and 34 14118. The specified setting of the particle sizes according to theinvention at from 50 to 1000 nm preferably takes place by the methodsdescribed in DE-C-12 60 135 and DE-A-28 26 925, or in Applied. PolymerScience, Vol. 9 (1965), page 2929. The use of polymers with differentparticle sizes is known, for example, from DE-A-28 26 925 and U.S. Pat.No. 5,196,480.

The novel molding compositions comprise, as component C, from 0.1 to 20%by weight, preferably from 5 to 15% by weight, particularly preferablyfrom 8 to 12% by weight, of a copolymer made from the followingmonomers:

c1) as component C1, from 50 to 90% by weight, preferably from 75 to 90%by. weight, particularly preferably from 85 to 80% by weight, of atleast one vinylaromatic monomer, and

c2) as component C2, from 10 to 50% by weight, preferably from 10 to 25%by weight, and in particular from 15 to 19% by weight, of acrylonitrileand/or methacrylonitrile.

Suitable vinylaromatic monomers are the abovementioned monomers C1 andthe vinylaromatic monomers mentioned above as component B21. Component Cis preferably an amorphous polymer as described above for graft B2. Inone embodiment of the invention, component C comprises a copolymer ofstyrene and/or α-methylstyrene with aciylonitrile. The acrylonitrilecontent in these copolymers of component C here is not above 25% byweight and is generally from 10 to 25% by weight, preferably from 10 to22% by weight, particularly preferably from 10 to 19% by weight, inparticular from 15 to 19% by weight.

In another embodiment of a copolymer of component C, this is preferablya styrene/acrylonitrile copolymer, an _(α)-methylstyrene/acrylonitrilecopolymer or an _(α)-methylstyrene/styrene/acrylonitrile terpolymer. Itis important that the acrylonitrile content in these copolymers C doesnot exceed 25% by weight, in particular 19% by weight, and is at least1% by weight. The copolymers may be used for component C eitherindividually or as a mixture, and the additional and separately preparedcomponent C of the novel molding compositions may, for example, be amixture of a styrene/acrylonitrile copolymer (PSAN) and an_(α)-methylstyrene/acrylonitrile copolymer. The acrylonitrile content ofthe different copolymers of component C may also vary. However,component C is preferably composed simply of one or morestyrene/acrylonitrile copolymers, which may have differing acrylonitrilecontents. In a particularly preferred embodiment, component C iscomposed simply of one styrene/acrylonitrile copolymer.

The novel molding compositions comprise, as component D, from 0 to 20%by weight, preferably from 0.1 to 12.5% by weight, particularlypreferably from 5 to 7.5% by weight, of a copolymer similar to that incomponent C, where the content in % by weight of acrylonitrile and/ormethacrylonitrile, preferably acrylonitrile, is different in componentsC and D. The content of acrylonitrile and/or methacrylonitrile in thecopolymer of component D is preferably higher than that in component C.

In one embodiment of the invention, the component D used is a copolymerof styrene and/or _(α)-methylstyrene with acrylonitrile. Theacrylonitrile content in these copolymers of component D here is above25% by weight, generally from >25 to 40% by weight and in particularfrom >25 to 35% by weight.

In another embodiment of a copolymer of component D, this is preferablya styrene/acrylonitrile copolymer, an _(α)-methylstyrene/acrylonitrilecopolymer or an _(α)-methylstyrene/styrene/acrylonitrile terpolymer.Here, too, it is preferable for the content of acrylonitrile in thesecopolymers to be from >25 to 40% by weight and preferably from >25 to35% by weight. The copolymers may be used individually or as a mixturefor component D, with the result that the additional, separatelyprepared component D in the novel molding compositions may be a mixturemade from a styrene/acrylonitrile copolymer (PSAN) with an ₆₀-methyl-styrene/acrylonitrile copolymer, for example. The acrylonitrilecontent of the various copolymers of component D may also differ.However, component D is preferably composed of just one, or of two ormore, styrene/acrylonitrile copolymers, where the copolymers may have adifferent content of acrylonitrile. In one particularly preferredembodiment, component D is composed of just one styrene/acrylonitrilecopolymer.

The novel molding composition also comprises, as component E, based onthe entire molding composition, from 0.1 to 20% by weight, preferablyfrom 0.1 to 15% by weight and particularly preferably from 0.1 to 10% byweight, of a polyester other than component A. The polyester ofcomponent E has at least 50% by weight, preferably at least 70% byweight and particularly preferably 100% by weight, based on component E,of polyethylene terephthalate (PET). Other preferred polyesters ofcomponent E are the aromatic polyesters defined above. The PET used mayeither come directly from synthesis or else be a recycled material,preferably made from PET bottle regrind. The use of recycled PETmaterial is of interest firstly for cost reasons and secondly due to theaction of the recycled PET material in improving the toughness of themolding composition. The PET used according to the invention incomponent E is therefore with preference composed of at least 50% byweight, preferably at least 80% by weight, and particularly preferably100% by weight, of recycled PET material.

The novel molding composition also comprises, as component F, from 0.01to 10% by weight, preferably from 0.02 to 5% by weight, and particularlypreferably from 0.05 to 2% by weight, of at least one nucleating agentand of at least one transesterification stabilizer, where the ratio ofnucleating agent to transesterification stabilizer is from 0:1 to 1:10,preferably from 5:1 to 1:5 and particularly preferably from 2.5:1 to1:2.5.

In the novel molding composition it is preferable for the nucleatingagent in component F to be a particulate solid with a particle size offrom 0.1 to 15 μm, or for the transesterification stabilizer to be atleast one phosphorus-containing compound, or for the nucleating agent tobe a predominantly inorganic, particulate solid with a particle size offrom 0.1 to 15 μm and for the transesterification stabilizer to be atleast one phosphorus-containing compound.

Compounds of this type which form the transesterification stabilizer maybe either organic or inorganic phosphorus compounds. Preferred organicphosphorus compounds are in particular organic phosphites. A phosphiteof this type is tetrakis(2,4-di-tert-butylphenyl) bisphenyldiphosphite(Irgaphos® PEPQ from Ciba Geigy AG). Inorganic phosphorus compoundswhich may be used are in particular inorganic phosphates, such asmonozinc phosphates, in particular in the form of mono- or dihydrate, ormixtures of these, and particular preference is given to monozincphosphate dihydrate. The amount of the transesterification catalyst usedis preferably from 0.01 to 5% by weight, with preference from 0.05 to 2%by weight and particularly preferably from 0.1 to 0.3% by weight, basedon the molding composition.

The term “transesterification stabilizer” has a meaning equal to themeaning of the terms “transesterification protection” and“transesterification inhibitor”, respectively, used in the technicalterminology.

The mechanism of action of such transesterification inhibitors is thatthey deactivate residues of the catalysts, which is required in thesynthesis of polyesters. Such catalysts are organotitanium compounds as,for example, alkyl titanates. These compounds are able to activate estergroups via free coordination sites and to initiate transesterificationreactions. In this connection copolyesters are formed which arecharacterized in that they have a lower crystallinity, which factenhances the undesired tendency of adhesion of the injectionmouldedparts to the mould when they are removed from the mould. When using theabove described transesterification inhibitors they are dative-bonded tothe titanate; the resulting Zn/Ti complex is inactive with regard to theester groups.

The particulate solid for the nucleating agent may be eitherpredominantly organic or else predominantly inorganic, and the inorganicmaterials are preferred. Examples of predominantly organic materials areespecially sodium phenylphosphinate and polytetrafluoroethylene. Theinorganic materials may be divided into two groups, specifically intoaluminum- and silicon-based materials and particular preference is givento the silicon-based materials, in particular those based on siliconoxides. Besides silicon-based materials, magnesium-containing materialshave proven particularly successful here. Talc is therefore particularlypreferred as nucleating agent. The novel molding composition preferablycomprises from 0.01 to 5% by weight, with preference from 0.02 to 1% byweight and particularly preferably from 0.05 to 0.2% by weight, ofnucleating agents.

Use may also be made of component F to reduce the adhesion of the novelmolding compositions. In particular, the adhesion of the moldingcompositions to the surface of injection molds is reduced. It isparticularly preferable for there to be a reduction of the adhesionwithin the range of the processing temperature of the novel moldingcomposition, and particularly within the temperature range prevailingduring injection molding, from 200 to 300° C., preferably from 250 to300° C.

An advantage associated herewith is that firstly it is not essential toadd any adhesion-reducing agents to the molding composition, and forexample the amount added may be less than 0.5% by weight, based on themolding composition, and that secondly there is no need for the surfaceof the injection mold to be provided with adhesion-reducing agents.

Adhesion-reducing agents of this type for use in molding compositions ofthis type are known to the skilled worker, but it is preferable forthere to be no adhesion-reducing agents used in the injection moldingprocedure or in the molding composition.

The novel molding compositions comprise, as component G, from 0.1 to 10%by weight of conventional additives. Examples of additives of this typeare: UV stabilizers, oxidation retarders, lubricants, mold-releaseagents, dyes, pigments, colorants, antistats, antioxidants, stabilizersto improve thermal stability, to increase light stability, to raisehydrolysis resistance and chemical resistance, agents to preventdecomposition by heat, and in particular the lubricants useful forproducing moldings. These other additives may be metered in at any stageof the preparation process, but preferably at an early juncture so as tomake use at an early stage of the stabilizing effects (or other specificeffects) of the additive. Heat stabilizers or oxidation retarders areusually metal halides (chlorides, bromides or iodides) derived frommetals in group I of the Periodic Table of the Elements (for example Li,Na, K or Cu).

Suitable stabilizers are the usual hindered phenols, or else vitamin Eor compounds of similar structure. HALS stabilizers (hindered aminelight stabilizers) are also suitable, as are benzophenones, resorcinols,salicylates, benzotriazoles and other compounds (for example Irganox®,Tinuvin®, such as Tinuvin® 770 (HALS absorbers,bis(2,2,6,6-tetramethyl-4-piperidyl) sebacate) or Tinuvin® P (UVabsorber—(2H-benzotriazol-2-yl)-4-methylphenol) or Topanol®). Theamounts of these usually used are up to 2% by weight based on the entiremixture.

Suitable lubricants and mold-release agents are stearic acid, stearylalcohol, stearic esters and in general higher fatty acids, derivativesof these and appropriate mixtures of fatty acids having from 12 to 30carbon atoms. The amounts of these additives are from 0.05 to 1% byweight.

Other possible additives are silicone oils, oligomeric isobutylene, orsimilar substances. The usual amounts are from 0.05 to 5% by weight. Itis also possible to use pigments, dyes, color brighteners, such asultramarine blue, phthalocyanines, titanium dioxide, cadmium sulfidesand derivatives of perylenetetracarboxylic acid.

The amounts used of processing aids and stabilizers, such as UVstabilizers, lubricants and antistats, are usually from 0.01 to 5% byweight, based on the entire molding composition.

It is advantageous to add up to about 5% by weight, based on the moldingcomposition, of plasticizers, such as dioctyl phthalate, dibenzylphthalate, butyl benzyl phthalate, hydrocarbon oils,N-(n-butyl)benzenesulfonamide, or o- or p-tolueneethylsulfonamide. It ispossible to add amounts of up to about 5% by weight,based on the moldingcomposition, of colorants, such as dyes or pigments.

It is also preferable for the novel molding composition to have acomponent G with a copolymer which contains no butadiene derivative orno isoprene derivative, or neither of these.

The novel molding compositions comprise, as component H, from 0 to 30%by weight, based on their own weight, preferably from 0 to 20% by weightand particularly preferably from 0.1 to 12% by weight, of apolycarbonate. Suitable polycarbonates are any of those known to theskilled worker, and fusible polycarbonates are particularly suitable. Inthis connection reference is made to “Polymer Chemistry, AnIntroduction”, 2nd Edition, Malcolm P. Stevens Oxford

University Press, 1990, pp. 400-403 and “Principles of Polymerisation”,2nd Edition, George Odian, Wiley Interscience Publications, John Wileyand Sons, 1981, pp. 146-149. Particularly suitable polycarbonates havehigh flowability, preferably an MVR of >9cm³/10min, with preference >13cm³/10 min and particularly preferably >20 cm³/10 min at 300° C. and 1.2kp. Preferred components H have an MVR according to ISO 1133 of not morethan 100 cm³/10 min, preferably not more than 90 cm³/10 mn andparticularly preferably not more than 50 cm³/10 min. A particularlypreferred component H is Lexan 121R from General Electric Plastics. Theuse of recycled PC material in the form of either “post-industrial” or“post-consumer” recycled material has proven particularly suitable,since it processes particularly well. In a preferred embodiment of theinvention the molding composition is polycarbonate-free.

The novel molding composition may also comprise, as component H, from 0to 30% by weight, based on its own weight, of a polycarbonate and, ascomponent I, from 0.1 to 100% by weight, based on its own weight,preferably from 1 to 50% and particularly preferably from 10 to 30%, ofa fiber or in one embodiment may comprise both.

Fibers of this type generally have an average length of from 0.1 to 0.5mm, preferably from 0.1 to 0.4 mm, and a diameter of from 6 to 20 μm.Preference is given to glass fibers and mineral fibers, in particularglass fibers, preferably made from E glass. To achieve better adhesion,the fibers may have been coated with organosilanes, with epoxy silanesor with other polymeric coatings.

The components may be mixed in any known manner using any known methods.The components may be mixed as they stand or else in the form ofmixtures of one of the components with one or more of the othercomponents. For example, component B may be premixed with some or all ofcomponents C or D and then mixed with the other components. Ifcomponents B, C and D have been prepared by, for example, emulsionpolymerization it is possible to mix the resultant polymer dispersionswith one another and then to precipitate the polymers together and workup the polymer mixture. However, it is preferable for components B, Cand D to be blended by extruding, kneading or milling the componentstogether, components B, C and D having previously been isolated, ifrequired, from the aqueous dispersion or solution obtained during thepolymerization. The novel thermoplastic molding compositions may, forexample, be prepared by mixing component A with each of components B, Cand D or with a mixture made from these, and, where appropriate, mixingwith the other components, melting in an extruder and introducing thefibers via an inlet to the extruder.

The novel molding compositions may be processed by thermoplasticprocesses known per se, to give moldings. In particular, they may beproduced by thermoforming, extrusion, injection molding, calendering,blow molding, compression molding, sintering or pressure sintering,preferably by injection molding. The moldings produced from the moldingcompositions of the invention are likewise provided by the presentinvention.

The moldings produced from the novel molding compositions have only lowemissions of volatile constituents with detectable odor. The odorperformance of polymeric materials is assessed to DIN 50011/PV 3900 andapplies to components for the interiors of motor vehicles. In the caseof the novel moldings, the result of the odor test to this Standard isgenerally better than grade 5, preferably better than grade 4.5 andparticularly preferably better than grade 4. The carbon emission fromthe moldings to PV 3341 is generally <50 μg/g, preferably <40 μg/g,particularly preferably <35 μg/g. The lower limit is preferably 20 μg/g.

The novel moldings also have good heat resistance. The Vicat B softeningpoint is generally >120° C., preferably >125° C. and particularlypreferably, 130° C. The upper limit of the Vicat B softening point ispreferably 160° C.

The novel moldings also have good impact strength, even in coldconditions. This is seen from the fact that the moldings formed from thenovel molding compositions do not fracture, even at low temperatures.

The modulus of elasticity of the fiber-reinforced moldings ispreferably >2000 MPa, with preference >3500 MPa, and not more than 1500MPa, their yield stress is generally >40 MPa, preferably >70 MPa, butpreferably not more than 150 MPa, they do not fracture when their impactstrength is tested to ISO 179/1eU, and their impact strength ispreferably from 30 to 80 kJ/m², and their flowability as MVR (meltvolume rate 275° C./2.16 kp applied force to ISO 1133) is >10 cm³/10min, preferably >15 cm³/10 min, but not more than 30 cm³/10 min.

The novel moldings do not show any splintering in the penetration testat −30° C. (2 and 3 mm plaque diameter, to ISO 6603/2), even afterheat-aging at 130° C. for 1000 h.

According to the invention moreover the specific gravity of the moldingcomposition is from 1.1 to 1.5, preferably from 1.2 to 1.4 andparticularly preferably from .12 to 1.3.

One embodiment of the invention is given by moldings with one or more ofthe features i) to vii)

i) PV 3341 carbon emission <50 μg of carbon/g;

ii) a grade better than 5 as the result of the DIN 50 011/PV 3900 odortest;

iii) Vicat B softening point >120° C.;

iv) density of from 1.1 to 1.5 g/cm³;

v) flowability, as melt volume rate at 275° C. and 2.16 kp to ISO 1133,of >10 cm³/10 min;

vi) reduction in impact strength to ISO 179/1eU after 1000 h ofheat-aging at 1,20° C. of <30% compared with the value prior toheat-aging;

vii) elongation at break to DIN 53457>2% after 1000 h of heat-aging at130° C.

The invention also provides a laminate which comprises a novel moldingand a polycondensate foam. It is advantageous for there to be a firmbond, via their surfaces, between the molding and the polycondensatefoam. The laminates have excellent adhesion between the foam and thesurface of the molding, without any need for pretreatment of thissurface, for example by a primer. When the foam is pulled away or peeledaway from the surface of the molding, cohesive fracture is observed:residues of foam remain on the surface. The polycondensate foam used maybe any of the foamable polycondensates known to the skilled worker. Inanother embodiment of the invention it is preferable for the foam to beapplied to the surfaces of the molding without using a primer. Preferredpolycondensates here are polyamides and polyurethanes, particularlypreferably polyurethanes. Among the polyurethane foams, particularpreference is in turn given to semirigid and flexible foams, which may,if desired, comprise adhesion promoters. A particular polyurethane foamused is Elastoflex® from Elastogran GmbH, Lemförde, Germany. Othersuitable polyurethanes may be found in Kunststoffhandbuch Vol. 7,Polyurethane, 3rd edition, 1993, Karl Hanser Verlag, Munich, Vienna.

The novel molding compositions and the resultant moldings or productsare also suitable for recycling. The recycled materials obtained fromthe novel molding compositions or moldings can be reprocessed to givemoldings which have at least one of the material properties describedabove. Based on the molding, the amount. of recycled material inmoldings of this type made from recycled material is at least 10% byweight, preferably at least 20% by weight and particularly preferably atleast 70% by weight. The recycling takes place by processes well knownto the skilled worker. In particular, the novel molding compositionsmake comminution and thermal recycling of the moldings easier. In thiscontext particular preference is given to diene-free moldingcompositions.

Basically, the process of recycling the structural parts consisting ofthe moulding compound according to the invention may be carried out intwo alternative ways:

(a) a step of recycling the material (material recycling), i.e. thepolymer material is recovered in a pure form and is supplied to steps ofprocessing the polymers with simultaneous melting as, for example, stepsof extrusion moulding, press moulding or injection molding; or,

(b) a step of recycling the polymer chemically (raw material recycling)through hydrolysis or pyrolysis of the polymer material and subsequentdestillative and/or extractive working-up under conditions generallyknown to a person skilled in this technical field. The raw materialsthus recovered may be employed in further processes.

When recycling the composites according to the invention or thestructural parts formed thereof, respectively, a precondition of therecycling step sequence are usual process steps like a step ofdisassembling the materials easy to separate as well as of removingfixing elements (fittings), a step of peeling-off the polyurethane foams(if such foams were applied to the composites of the invention), stepsof crushing, separating an classifying, further processing steps asmixing and homogenizing in apparatus suitable for such steps and stepsof cleaning and removing dust under process conditions generally knownto a person skilled in this field. Such steps are followed by steps ofprocessing the polymer thus obtained in a manner described above.

The properties described above, in particular the heat-aging resistanceand the heat resistance, make the molding compositions, moldings,laminates or recycled materials according to the invention, or any twoor more of these, suitable for use in products, in particular forapplications in the interior of motor vehicles or for exterior bodyparts of motor vehicles.

The invention also provides products preferably for the interior ofmotor vehicles for exterior body parts of motor vehicles and comprisingmolding compositions, moldings, laminates or recycled materialsaccording to the invention, or any two or more of these.

It is particularly preferable for the novel moldings or products to belaser-markable.

Preferred novel moldings or products for the interior of motor vehiclesare therefore protective coverings, storage compartments, dashboardsupports, door breasts, parts for the center console, and also retainingelements for radio and air-conditioning system, covers for the centerconsole, covers for radio, air-conditioning system and ashtray,prolongations of the center console, storage pockets, storage areas forthe driver's door and the passenger's door, storage areas for the centerconsole, components for the driver's and passenger's seats, such as seatcoverings, light-switch housings, lamp housings, housings for: thevehicle's electronic system, for example the ABS electronics, ASCelectronics, stability control electronics, gearbox electronics, seatelectronics, mirror motor electronics, window-lifter motor electronics,retractable-roof electronics, airbag triggering electronics,seat-occupation detection electronics, passenger-compartment safetyelectronics, acceleration-sensor electronics or ignition electronics,and multipoint connectors, plug connectors, lock-system housings,protective covers for wiper housings, lock housings, and also roofracks, defroster ducts, internal mirror housings, sun-roof elements,such as sun-roof frames, covers and protective surrounds forinstruments, instrument sockets, upper and lower shells for the steeringcolumn, air ducts, air blowers and adapters for personal air-flowdevices and defroster ducts, door side coverings, coverings in the kneearea, air-outlet nozzles, defroster apertures, switches and levers.These applications are merely examples of possible applications in motorvehicle interiors and are not limited to applications in motor vehicleinteriors.

Preferred moldings or products for exterior body parts are moreover inparticular fenders, tailgates, side paneling, bumpers, other paneling,identification plate supports, panels, sunroofs, sunroof frames, andalso impact protectors and constituents of these.

Other applications which may be mentioned merely by way of example forother moldings or products not restricted to the motor vehicle sectorare boat hulls, lawnmower housings, garden furniture, motorcycle parts,camera cases, cases for mobile telephones, tube sections for binoculars,vapor ducts for vapor-extraction hoods, parts for pressure cookers,housings for hot-air grilles and pump housings.

By comparison with the abovementioned moldings or products, the use ofthe molding compositions has proven particularly successful in the caseof plug connectors, housing parts, in particular for the electronicsystems of motor vehicles, particularly ABS/ASR electronics, ESP gearboxelectronics, seat electronics, mirror motor electronics, window liftermotor electronics, retractable roof electronics, airbag triggeringelectronics, passenger compartment safety electronics, acceleratorsensor electronics or ignition electronics, or else in the electronicsfor detecting seat occupation. Other preferred uses of the novel moldingcompositions are locking system housings, autorelays, and covers forwiper housings, and also for lock housings.

Another preferred group of moldings or products which can be producedfrom the novel molding compositions is that of gas meter housings, winddeflectors, actuating-motor housings, where the actuating motors arepreferably used in automotive construction, parts for power drills,parts for ovens, in particular to insulate from heat, for example knobsand oven handles, screen wiper parts, in particular wiper blademountings, spoilers, mirror support plates for motor vehicle mirrors,and housings for washing machine control systems.

The novel molding compositions are also suitable for other moldings usedin the household sector, preferably in the kitchen sector. These includebread-baking machines, toasters, table grills, kitchen machinery,electric tin-openers and juice presses. In these articles it ispreferably the switches, housings, handles and covers which are producedfrom the novel molding compositions. The novel molding compositions mayalso be used for moldings in stoves, preferably stove handles, stoveknobs and switches.

The novel molding compositions may also be used in moldings which meetthe requirements of the Federal Drug Administration or of comparablenational authorities in other countries. In this sector particularpreference is given to packaging for pharmaceutical products and packsfor pharmaceutical kits.

The novel molding compositions may also be used in the food and drinkpackaging sector. Preference is given here to moldings such as boxes,pots, dishes and other types of container made from the novel moldingcompositions.

When considering the uses for the novel molding compositions, particularemphasis should be given to their safety in contact with food and drinkand to their resistance to fats and liquids, particularly advantageousin parts for household devices.

The use of the molding compositions defined above has provenparticularly successful in producing moldings which are highlyheat-resistant. Particular moldings of this type are headlamp parts usedin the vicinity of the headlamp, in which the temperature when theheadlamp is operating can exceed 100° C., preferably 110° C. andparticularly preferably 130° C., but is not more than 200° C. Parts ofthis type may either be glass-fiber-reinforced or notglass-fiber-reinforced.

The advantage of using the novel molding compositions is in particularthat no matting of the surface occurs in headlamp parts of this typewith a reflecting, metalized surface. The result of using the novelmolding compositions is that, even after prolonged operation of theheadlamp, there are no deposits on the transparent areas of the headlampwhich transmit the light, and the reflective properties of metalizedsurfaces of these moldings are retained. The novel molding compositionsmay also be used for producing other headlamp components. These headlampcomponents include in particular headlamp housings, headlamp frames,headlamp retainers and headlamp guides, preference being given toheadlamp frames.

The other advantageous properties of the novel molding compositions,such as low cycle times, no mold-deposit formation during injectionmolding, and also excellent quality of the metalized surfaces, are,furthermore, retained.

In particular, no clouding of the metalized surface occurs on heatingthe molding to from 100 to 200° C., preferably from 110 to 180° C. andparticularly preferably from 130 to 170° C., and moldings may thereforebe obtained which have metalized surfaces with long-lasting reflectiveproperties.

The use of the novel molding compositions has also proven successful inproducing large-surface-area moldings which are comparatively thin inrelation to their surface area and for which excellent demoldingperformance is demanded. Particular large-surface-area moldings of thistype are sunroof rails, body parts, air inlet grilles, dashboard partssuch as dashboard supports, protective covers, air ducts, add-on parts,in particular for the center console, a part of the glove compartment,and protective surrounds for tachometers.

The examples below illustrate the invention in greater detail:

EXAMPLE Example and Comparative Example

As shown by the data in Table 1 below, the stated amounts ofpolybutylene terephthalate (PBT), graft rubbers P1 and P2, PSANcopolymers and additives were mixed in a screw extruder at from 250 to270° C. The resultant molding compositions were used to injection moldthe test specimens appropriate for the relevant DIN standards.

PBT is a polybutylene terephthalate with a viscosity number of 130(determined in a polymer solution (0.05 g/ml) in phenol and1,2-dichloromethane (1:1)).

Glass fiber (chopped glass made from standard glass)

P1 is a small-particle ASA graft rubber with 25% by weight ofacrylonitrile in the SAN graft shell and with a median particle size ofabout 100 nm.

PSAN 33 is a styrene/acrylonitrile copolymer with 33% by weight ofacrylonitrile.

PSAN 19 is a styrene/acrylonitrile copolymer with 19% by weight ofacrylonitrile.

Mold-release agent is Loxiol VPG 861/3,5 from Henkel.

Nucleating agent is IT Extra talc.

Transesterification stabilizer is monozinc phosphate dihydrate.

Carbon black is Black Pearls 880.

Table 2 gives the results of the tests carried out.

TABLE 1 Precise mixing specifications (data in % by weight) Startingmaterial Reference Molding composition I PBT (VN 130) 48 47.7 Glassfiber 20 20 PET 10 10 ASA 10 6 PSAN 33 11 5 PSAN 19 10 Loxiol 0.5 0.5Nucleating agent 0.1 Transesterification stabilizer 0.2 Carbon black 0.50.5

TABLE 2 Tests on injection molded specimens to DIN/ISO: Molding PropertyUnit Reference composition I MVR 275/2.16 cm³/10 min 18 22 ISO 179/1eUkJ/m² 49 48 ISO 179/1eA kJ/m² 6.7 7.0 Modulus of elasticity MPa 68507400 Yield stress MPa 103 118 Elongation at break % 2.4 2.4 Penetrationenergy Nm 2.5 3.5 HDT B ° C. 208 212 Surface good good Minimum cycletime* s 20 12.5 *The cycle time was determined on a demolding strip(strip with 40 short ribs). The dimensions of the molding were asfollows: Volume: 20 cm³ Dimensions: 135 × 50 × 12 mm Wall thickness: 2.0mm Sprue gate Injection/mold temperature: 270/80° C.

The cooling time, and thus the cycle time, is reduced until the moldingwith its ribs remains behind adhering to the mold. The fact that themolding remains behind adhering to the mold is an unambiguous criterionfor evaluation. The minimum cycle time is the time which still justmakes it possible for the moldings to demold.

We claim:
 1. A molding composition comprising, based on the total ofcomponent A to C and E to G, which is 100% by weight, a) as component Aof the molding composition, from 1 to 99.59% by weight of at least onepolyester, b) as component B, from 0.1 to 20% by weight of at least oneparticulate graft copolymer made from b1) from 50 to 90% by weight of agraft base B1 with a glass transition temperature below 0° C., and b2)from 10 to 50% by weight of a graft B2 made from the following monomersb21) as component B21, from 50 to 90% by weight of a vinylaromaticmonomer, and b22) as component B22, from 10 to 50% by weight ofacrylonitrile and/or methacrylonitrile, as component B, c) as componentC, from 0.1 to 20% by weight of at least one copolymer made from thefollowing monomers c1) as component C1, from 50 to 90% by weight of atleast one copolymer made from the following monomers. c2) as componentC2, from 10 to 50% by weight of acrylonitrile and/or methacrylonitrile,in each case based on component C, e) as component E, from 0.1 to 20% byweight of a polyester other than component A, f) as component F, from0.01 to 10% by weight of at least one nucleating agent and of at leastone transesterification stabilizer, where the ratio by weight ofnucleating agent to transesterification stabilizer is from 1:100 to100:1, and g) as component G, from 0.1 to 10% by weight of customaryadditives, including carbon black, UV stabilizers, oxidation retarders,lubricants and mold-release agents.
 2. A molding composition as claimedin claim 1, wherein in component F the nucleating agent is a particulatesolid with a particle size of from 0.1 to 15 μm, or thetransesterification stabilizer is at least one phosphorus-containingcompound, or the nucleating agent is a particulate solid with a particlesize of from 0.1 to 15 μm and the transesterification stabilizer is atleast one phosphorus-containing compound.
 3. A molding composition asclaimed in claim 1, where this additionally comprises, as component H,from 0 to 30% by weight, based on its own weight, of a polycarbonateand, as component I, from 0.1 to 100% by weight, based on its ownweight, of a fiber.
 4. A molding composition as claimed in claim 3,where the polycarbonate of component H has a flowability expressed asmelt volume rate at 300° C. with 1.2 kp to ISO 1133 of from 9 to 100cm³/10 min.
 5. A molding composition as claimed in claim 1, wherecomponent A is composed of a1) from 50 to 100% by weight of polybutyleneterephthalate, and of a2) from 0 to 50% by weight of anotherpolycondensate.
 6. A molding composition as claimed in claim 1, wherecomponent B is composed of b1) from 50 to 90% by weight of a particulategraft base B1 made from the following monomers b11) as component B11,from 75 to 99% by weight of a C₁-C₁₀-alkyl acrylate, b12) as componentB12, from 0.1 to 10% by weight of at least one polyfunctional monomerhaving at least two non-conjugated olefinic double bonds, and b13) ascomponent B13, from 0 to 24% by weight of one or more othercopolymerizable monomers, and of b2) from 10 to 50% by weight of a graftB2 made from the following monomers b21) as component B21, from 50 to90% by weight of a vinylaromatic monomer, and b22) as component B22,from 10 to 50% by weight of acrylonitrile and/or methacrylonitrile.
 7. Amolding composition as claimed in claim 1, where component B is composedof from 10 to 90% by weight of a small-particle graft copolymer with amedian particle size of from 50 to 200 nm and of from 10 to 90% byweight of a large-particle graft copolymer with a median particle sizeof from 250 to 1000 nm.
 8. A molding comprising molding compositions asclaimed in claim
 1. 9. A molding as claimed in claim 8, with on or moreof the features i) to vii) i) PV 3341 carbon emission <50 μg ofcarbon/g; ii) a grade better than 5 as result of the DIN 50 011/PV 3900order test; iii) Vicat B softening point >120° C.; iv) density of from1.1 to 1.5 g/cm³; v) flowability, as melt volume rate at 275° C. and2.16 kp to ISO 1133, of >10 cm³/10; vi) reduction in impact strength toISO 179/1eU after 100 h of heat-aging at 120° C. of <30% compared withthe value prior to heat-aging; vii) elongation at break to DIN 53457>2%after 1000 h of heat-ageing at 130° C.
 10. A laminate comprising amolding as claimed in claim 8 and a polycondensate foam.
 11. A processfor recycling a molding as in claim 8 which comprises a) crushing themolding b) separating from the crushed composition any optionallypresent foreign materials c) recovering the molding composition, d)homogenizing the recovered molding composition, and e) forming a newmolding comprising said homogenized composition.
 12. A molding ascomposition as prepared in claim
 11. 13. A molding for the interior ofmotor vehicles or for external body parts of motor vehicles comprisingrecycled materials as claimed in claim
 12. 14. A laminate comprising themolding of claim 12 and a polycondensate foam.
 15. A molding for theinterior of motor vehicles or for external body parts of motor vehicles,comprising molding compositions as claimed in claim 1.